docs: def _populate_setup(self):
          """Just create a local marker file since the actual database should
          already be created on the Fuseki server.
  
          """
          makedirs(os.path.dirname(self._cache_marker))
          with codecs.open(self._cache_marker, 'w', encoding='utf-8') as fobj:
              fobj.write(self.cache_uri)
          self.graph.open(self.cache_uri)